Methanol fuel cells use
liquid methanol to generate electricity. They are useful in places where low power is needed
for a long period of time in a small package. These are now commercially available.

Up to 25W of continuous maximum
power

Weighs just 1.24 kg (2.7 lbs)

Dimensions 5.9 x 9.1 x 1.7 inches

Limited Safety Assessment Report (SAR)
from the Army Power Division of the U.S. Armys Research Development and Engineers Command
(RDEC) and Communications- Electronics Research Development and Engineering Center (CERDEC),
which certified it safe to be worn by soldiers in the field and used to power portable
devices.